The Indian rupee strengthened by 5 paise to 45 rupees 19 paise per dollar at the Interbank Foreign Exchange today. The Indian currency was supported by a higher opening in the stock market and dollar weakness against other currency rivals. The rupee had depreciated by 6 paise to close at 45 rupees 25 paise per dollar in the previous session due to sustained dollar demand from importers and sluggish equities.